gpi-populate-days.php: Addes snippet to populate radio field with upcoming occurrences of a specific weekday, with configurable inventory limit and cutoff logic.

Author: matty0501

gp-inventory/gpi-populate-days.php

@@ -0,0 +1,84 @@
+<?php
+/**
+ * Gravity Perks // Inventory // Populate Days into Radio Field
+ * https://gravitywiz.com/documentation/gravity-forms-inventory/
+ *
+ * Populate a Radio field with the next `n` days, and assign each choice to have `x` inventory.
+ *
+ * For example, you can populate a Radio field with the next 10 Thursdays, with each Thursday having an inventory of 25.
+ * This is useful if you offer a service on a specific day only, and need users to select which date they want.
+ *
+ * Additionally, you can set a cutoff day and time for showing a day this week. For example, you can only show the current
+ * week's Thursday if it is before 4pm on Tuesday. This is useful if you need to set a cut-off time for bookings this week.
+ *
+ * Instructions:
+ *
+ * 1. Install the snippet.
+ *    https://gravitywiz.com/documentation/how-do-i-install-a-snippet/
+ *
+ * 2. Follow the inline instructions to configure the snippet for your form.
+ */
+// Change `123` to your form ID
+add_filter( 'gform_pre_render_123', 'gw_populate_days_into_radio', 5, 1 );
+add_filter( 'gform_pre_validation_123', 'gw_populate_days_into_radio', 5, 1 );
+function gw_populate_days_into_radio( $form ) {
+
+	// Update `1` with your Radio Button field ID
+	$field_id = 1;
+
+	// Update `thursday` with the day you want to populate
+	$day = 'thursday';
+
+	// Update `2` to your cut-off day for booking this week. Monday is 1, Tuesday is 2 etc.
+	$cutoff_day = 2;
+
+	// Update `16` to your cut-off time for booking this week. The time is in 24 hour format, so 16 is 4pm.
+	$cutoff_time = 16;
+
+	// Update `10` to the number of days to populate
+	$number_of_days = 10;
+
+	// Update `25` to the inventory limit each day should have
+	$inventory = 25;
+
+	// Update `l, F j, Y` to the PHP date format you want the populated days to be shown in.
+	// More information about formats can be found here: https://www.php.net/manual/en/datetime.format.php
+	$format = 'l, F j, Y';
+
+	// That's it, stop editing!
+
+	static $has_run = false;
+	if ( $has_run ) {
+		return $form;
+	}
+	$has_run = true;
+
+	foreach ( $form['fields'] as &$field ) {
+		if ( $field->id == $field_id && $field->type == 'radio' ) {
+
+			$choices   = array();
+			$today     = new DateTime();
+			$start_day = new DateTime( 'this ' . $day );
+
+			// If it's past the cutoff, also skip this week's day
+			if ( ( $today->format( 'N' ) == $cutoff_day && (int) $today->format( 'H' ) >= $cutoff_time ) || $today->format( 'N' ) > $cutoff_day && $today->format( 'N' ) <= $start_day->format( 'N' ) ) {
+				$start_day->modify( '+1 week' );
+			}
+
+			// Generate next n days
+			for ( $i = 0; $i < $number_of_days; $i++ ) {
+				$label     = $start_day->format( $format );
+				$choices[] = array(
+					'text'            => $label,
+					'value'           => $label,
+					'inventory_limit' => $inventory,
+				);
+				$start_day->modify( '+1 week' );
+			}
+
+			$field->choices = $choices;
+		}
+	}
+
+	return $form;
+}